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Old 10-31-2011, 02:36 PM
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FSETH FSETH is offline
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Join Date: Apr 2007
Location: Marietta, GA
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I think you may be overestimating your fuel savings on the 3.5. The 5.0 should be very similar to your current 4.8. If you are frustrated with the gas mileage, get a diesel or step away from the X5/6 range all together, imo.

Check out this website and compare the 3 of them.

Fuel Economy
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